He admits in the Blu-ray special features of Spider-Man: Far From Home that he loved how cool it looked, but he also loved how much more comfortable it was.
Some of these suits were real, some of them were entirely CGI.
Although, his reasons for it being his favorite are potentially slightly different than everybody else.
Of all of them, it seems that fans were most excited to see the introduction of the Stealth Suit, and, as it turns out, that one was Tom Holland’s favorite as well.